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HBaseHbck.java
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HBaseHbck.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.client;
import java.io.IOException;
import java.util.List;
import java.util.stream.Collectors;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;
import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos;
import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.GetTableStateResponse;
import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.HbckService.BlockingInterface;
import org.apache.hbase.thirdparty.com.google.protobuf.ServiceException;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Use {@link ClusterConnection#getHbck()} to obtain an instance of {@link Hbck} instead of
* constructing an HBaseHbck directly.
*
* <p>Connection should be an <i>unmanaged</i> connection obtained via
* {@link ConnectionFactory#createConnection(Configuration)}.</p>
*
* <p>NOTE: The methods in here can do damage to a cluster if applied in the wrong sequence or at
* the wrong time. Use with caution. For experts only. These methods are only for the
* extreme case where the cluster has been damaged or has achieved an inconsistent state because
* of some unforeseen circumstance or bug and requires manual intervention.
*
* <p>An instance of this class is lightweight and not-thread safe. A new instance should be created
* by each thread. Pooling or caching of the instance is not recommended.</p>
*
* @see ConnectionFactory
* @see ClusterConnection
* @see Hbck
*/
@InterfaceAudience.Private
public class HBaseHbck implements Hbck {
private static final Logger LOG = LoggerFactory.getLogger(HBaseHbck.class);
private boolean aborted;
private final BlockingInterface hbck;
private RpcControllerFactory rpcControllerFactory;
HBaseHbck(ClusterConnection connection, BlockingInterface hbck) throws IOException {
this.hbck = hbck;
this.rpcControllerFactory = connection.getRpcControllerFactory();
}
@Override
public void close() throws IOException {
// currently does nothing
}
@Override
public void abort(String why, Throwable e) {
this.aborted = true;
// Currently does nothing but throw the passed message and exception
throw new RuntimeException(why, e);
}
@Override
public boolean isAborted() {
return this.aborted;
}
@Override
public TableState setTableStateInMeta(TableState state) throws IOException {
try {
GetTableStateResponse response = hbck.setTableStateInMeta(
rpcControllerFactory.newController(),
RequestConverter.buildSetTableStateInMetaRequest(state));
return TableState.convert(state.getTableName(), response.getTableState());
} catch (ServiceException se) {
LOG.debug("table={}, state={}", state.getTableName(), state.getState(), se);
throw new IOException(se);
}
}
@Override
public List<Long> assigns(List<String> encodedRegionNames) throws IOException {
try {
MasterProtos.AssignsResponse response =
this.hbck.assigns(rpcControllerFactory.newController(),
RequestConverter.toAssignRegionsRequest(encodedRegionNames));
return response.getPidList();
} catch (ServiceException se) {
LOG.debug(toCommaDelimitedString(encodedRegionNames), se);
throw new IOException(se);
}
}
@Override
public List<Long> unassigns(List<String> encodedRegionNames) throws IOException {
try {
MasterProtos.UnassignsResponse response =
this.hbck.unassigns(rpcControllerFactory.newController(),
RequestConverter.toUnassignRegionsRequest(encodedRegionNames));
return response.getPidList();
} catch (ServiceException se) {
LOG.debug(toCommaDelimitedString(encodedRegionNames), se);
throw new IOException(se);
}
}
private static String toCommaDelimitedString(List<String> list) {
return list.stream().collect(Collectors.joining(", "));
}
}